Metrological lexicon

Acceptance criteria

Criteria determining whether or not measuring equipment is compliant with a prescription guideline. The criteria should be specified in the context of the customer / supplier relationship.> Visit our Calibration Services page

Calibration

Operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication.> Visit our Calibration services page

Maintenance performed after detection of a problem to fix property so that it can carry out the required functionalities.> Visit our Repair and maintenance page offer

Maintenance

Preventive maintenance: maintenance performed in predetermined intervals or according to identified criteria in order to reduce the risk of failure and the degradation of the proper functioning of property.

Corrective maintenance: maintenance performed after detection of a problem to fix property so that it can carry out the required functionalities.

Set of correlated or interactive elements, which are necessary to establish metrological compliance and continuous assessment of measurement processes.

Measurement process

Set of operations to determine the value of a quantity.

Measurement standard

Realization of the definition of a given quantity, with stated quantity value and associated measurement uncertainty, used as a reference.
A measurement standard is frequently used as a reference in establishing measured quantity values and associated measurement uncertainties for other quantities of the same kind, thereby establishing metrological traceability through calibration of other measurement standards, measuring instruments, or measuring systems.> Visit our Calibration services page offer

Distinguishing feature, which can influence measurement results. Measuring equipment usually has several metrological characteristics, which can be calibrated.> Visit our Calibration Services page

Metrological confirmation

Set of operations required to ensure that measuring equipment conforms to the requirements for its intended use. Metrological confirmation generally includes calibration and verification, any necessary adjustment or repair, and subsequent recalibration, comparison with the metrological requirements for the intended use of the equipment, as well as any required sealing and labelling. Metrological confirmation is not achieved until and unless the fitness of the measuring equipment for the intended use has been demonstrated and documented. The requirements for intended use include such considerations as range, resolution and maximum permissible errors.> See our Calibration Services page

(ISO/IEC GUIDE 99:2007)
Measurement standard designated for the calibration of other measurement standards for quantities of a given kind in a given organization or at a given location.

Verification

Provision of objective evidence that a given item fulfils specified requirements. The item may be, e.g. a process, measurement procedure, material, compound, or measuring system. The specified requirements may be, e.g. that a manufacturer's specifications are met.